package cn.tedu.jdbc;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.Scanner;

public class JDBCLogin02 {
    public static void main(String[] args) {
        try ( Connection connection = DBUtil.getConnection();){
            Scanner scanner = new Scanner(System.in);
            System.out.println("请输入用户名：");
            String username = scanner.nextLine();
            System.out.println("请输入密码：");
            String password = scanner.nextLine();
            String sql="SELECT nickname FROM userinfo WHERE username=? AND password=?";
            PreparedStatement preparedStatement = connection.prepareStatement(sql);
            preparedStatement.setString(1,username);
            preparedStatement.setString(2,password);
            ResultSet r=preparedStatement.executeQuery();
            if (r.next()){
                String nickname = r.getString("nickname");
                System.out.println("登录成功，欢迎您："+nickname);
            }else {
                System.out.println("登录失败，用户名或密码错误");
            }


        } catch (SQLException e) {
            throw new RuntimeException(e);
        }


    }
}
